Thomas Stalcup says in lawsuits filed in Boston last week that he received inadequate responses to Freedom of Information requests to the Missile Defense Agency and the Navy Special Warfare Command.

Stalcup, a physicist who lives in Sandwich, Mass., has challenged the National Transportation Safety Board‘s determination that the explosion of the aircraft’s center fuel tank caused the New York-to-Paris flight to crash minutes after taking off from New York’s Kennedy Airport, killing all 230 people aboard.

He is among a group of people who believe the plane was downed by a missile.